9121002112 has 64 divisors (see below), whose sum is σ = 19262192040. Its totient is φ = 4287201280.

The previous prime is 9121002103. The next prime is 9121002113. The reversal of 9121002112 is 2112001219.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8976425536 + 144576576 = 94744^2 + 12024^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 9121002112.

It is not an unprimeable number, because it can be changed into a prime (9121002113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2385162 + ... + 2388982.

Almost surely, 2^9121002112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9121002112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9631096020).

9121002112 is an abundant number, since it is smaller than the sum of its proper divisors (10141189928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9121002112 is a wasteful number, since it uses less digits than its factorization.

9121002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949 (or 4937 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 9121002112 is about 95503.9376779827. The cubic root of 9121002112 is about 2089.3643749805.

The spelling of 9121002112 in words is "nine billion, one hundred twenty-one million, two thousand, one hundred twelve".